Chapter 1 sustainable urban food provisioning challenges for scientists policymakers planners and designers. Sustainable food planning evolving theory and practice andre viljoen johannes s c wiskerke on amazoncom free shipping on qualifying offers with over half . Stemming from the widely acknowledged challenges faced by our current dysfunctional food system in social economic and environmental terms this book aims . With over half the worlds population now deemed to be urbanised cities are assuming a larger role in political debates about the security and sustainability of the . Half the worlds population is now urbanised and cities are assuming a larger role in debates about the security and sustainability of the global food system
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